Weft detector in regularly-moving transferrer



R. G. TURNER WEFT DETECTOR IN REGULARLY MOVING TRANSFERRER Nov. 13, 1928.

Filed July 5, 1926 2 Sheets-Sheet 1 INVEN'TQF? WI CHAED G Tu FNER %W* AT-ro RN ys' Nov. 13, 1928. 1,691,141

R. G. TURNER WEFT DETECTOR IN REGULARLY MOVING TRANSFERRER Filed July s, 1926 2 Sheets-Sheet 2 IwvEN-ro i? F'XICHAQD GEQNEF? ATTQ RNEYS Patented Nov. 13, 1928 UNITED STATES PAT-ENT-FFICE.

- RICHARD e. TURNER, or WORCESTE MASSAGHUSETTS, AssIeNonTO OROMPTON &

KNOWLES LOOM WORKS, onwononsTnn, MASSACHUSETTS, A CORPORATION or MASSACHUSETTS. p

WEFT DETECTOR IN REGULARLY-MOVING TRANSNERRER. I

Application filed July 3, 1926. Serial NO. 120,490.

This invention relates to improvements in illustrate it in connection with, a caliper tteeler mounted in a regularly moving trans ferrer of an automatic weft replenishing loom. v

Nhen start-mg up a loom with a new warp it is frequently desirable to turn the loom over by hand but with the detectors I commonly employed this is likely to be accompanied by an indication of the magazinc and subsequent replenishment. .This action ofthe magazine is uncalled for and objectionable and it is a further Object of myv present invention to provide a detector which. will depend for its operation upon a certain predetermined rate of running which willxnormally be in excess of thatwhich can be attained by hand operation.

When a detector of the type set forth in patent to Ryon No. 1,372,316 1s employed it is found that the yarn engaging surface rests on the topof the bobbin duringthe forward and back movement of the lay for a length of-time suiiicient to cause wearing and it is a further object of my invention to reduce the timeot contact between the detector and the yarn by causmg the detector to startv moving downwardly only after the trans terror has reached its lowest position and then to remove the same from contact with the bobbin by spring action.

With these and other objects in view 'which will appear as the description pro- .ceeds, my'invention resides in the combination and arrangement of parts hereinafter described and set -forth in the claims.

Inthe accompanying drawings wherein I have shown a convenient embodiment of my invention, 1 i

Fig. 1 is a side elevation of a loom'having my invention applied thereto showing certa n parts in section,-

Fig. 2 is an enlarged front elevation of derives its indicating movementfrom' the transferrer arm and detector looking in the direction of arrow 2, Fig. 1, withthe detector cooperating witha full bobbin, 1

. 1g. 3 1s a vertical central section through the transierrer arm 1n a direction parallel to'the axis of the bobbin, showing the detector in indicating position when cooperating with a depleted bobbin,

Fig. 4 is a top plan View in the direction of arrow 4, Fig.2, and i F ig. 5 is a vertical section on line 5-5 of Fig. 3. j

Referring to the drawings it will be seen that have provided a loom frame and a lay 11 which normally moves back and forth toward and from the breast beam 12. The magazine M. has a transferrer arm' 13 ivotedat la and connectedto a link 15 the lower end of which is operatively connected to a lever 16 pivoted at 17 to some part of the loom structure. Said lever is provided with a roll 18 received by groove 19 of a cam 20 secured to the bottom shaft 21. The hat't 21' makes a revolution every other pick ofthe loom and causes a downward movement oftransferrer arm 13 when the shuttle S is on the magazine side of the loom. ,This

parto'f the construction is substantially the same as that set forthin the aforesaid patent to Ryon. Y

The controlling mechanism for the magazine comprises a plunger 22 slidably mounted in the transferrer arm 13 and having a shoulder 28 which receives the utward thrust of a compression spring 24 the other end of which bears against a clip 25 secured .to the transferrcr arm by a screw 26. The plunger has ahead 27 which engages the clip 25 to limit outward movement of, the plunger 22 under action of spring 241 when the head 27 is released. 1

' The plunger is normally held .in the retractedv position shown in. Fig. 2 by the hook 28 of a latch 29 pivoted as at 30 to the transferrer arm. Said latch 29 has. a depending tail 31 and contact between the latch 29 and head 27 is insured by a spring 32 held to a partofthe transferrer arm by a screw 33. The p1ungerand latch may be substantially the same as set forth in copending application Ser. No; 78,181.

In carrying outmypresent improvements .1 provide each side of the slot which extends vertically'through the transferrer arm with a groove 41 and mount for vertical motion in said grooves a detector element 42 the upper end of which is "operatively engaged with a spring 43 whiclr may convemently be secured t-o the transferrer arm by screw 83. The normal action of the spring 48 is to hold the detector member 42 in the raised position indicated in Fig. 2.

An actuator 44 is pivotedto the detector as at 45 and has an upstanding linger 46' positionedfor operative engagement with the tall 31. The lower endof the actuatoris offset and notched as at 47 and extends troller relatively to the detector.

between the opposite prongs 48 xtending downwardly from the bottom of the detector member 42. Said prongs have, broadened pads 49 which present a relatively large yarn engagin surface'which will not fray or abrade the yarn.

As the transferre r arm descends the sliding detector 42 will be in raised position, being held so by spring 43. When the transferrer reaches the bottom of its stroke the detector, due to its weight and inertia,

will tend to continue to move down against the action of spring 43 to present the pads 49 to the yarn.

Under normal conditions when a sufiicient supply of weft for continued weaving is present the transferrer arm 13 will be brought down to the position indicated in Fig. 2, the diameter of the weftlV on the the bottom B being such as to prevent down-- ward motion of the pads 39 suflicient to permit finger 46 to engage tall 31. l Vh'enthe yarn is substantially depleted, however, and

the tr'a'ns'ferrer moves to its lowest position the detector member 42 will continue its downward thereof and the pads 49 will pass down on the opposite sides of the bobbin as indicated in Fig. 5. This downward movement causes en' 'a ement between the offset end' latch to prevent movement of the lattershouldthe controller 44 move accidentally on its Divot. li l'ovement of the plunger 22 tothe rightas shown in Fig. 3 results in indicationyof weft change as set forth in the aforesaid patent to Ryo'n.

Immediately after the detector 42 has moved to the lowposition'indi'cated in Fig. 5 and has spent its inertia the spring 43 acting independently of the'upwar'd 'inovemovement due to the inertia ment of the transferrer arm. will raise the detector 42.

It will also be seen that the detector will start back to normal position under action of the spring 43 independently of the particular position of the transferrer arm. Fm-thennore, a slow turning over of the loom such results from hand operation will not give the detector 42 a downward motion of suliicient rapidity to cause an in dication and it is therefore unnecessary to provide an auxiliary device to prevent in-- fdication of wett exhaustion as is the case with the usual form of detector. Again, it

will be seen that the detector does not start toward operative engaging position until the transferrer has actually come to rest at the lower limit of itsmoti'on and the result of this, is that the detector is in contact with the yarn a very short time.

Having thus described my invention it.

cations may be made therein by those skilled inthe' art without departing from the spirit and scope of the invention, and I do not wish'to be limited to the details herein disclosed but what I claim is:

1. In a weft detector for a loom having a surface to be detected, a detector to cooperate with the surface, means to cause relative motion. between the detector and the surface to lessen the distance between said detector and surface, a support for the de tector, means exerting a force'on the detector to cause the latter to maintain the same relative position with respect to the support during" the time that the distance be.

tween the surface and detector-is being reduced, means to cause an abrupt change in the force acting on the detector as the distance between the detector and surface is reduced, a weighted mass oper'atively con nected to the detector and tending to act by the inertiafthereof at the time of said abrupt change to cause-a relative change in the relation of the detector and support therefor and tending to give the detector an with indicating movement while in contact the surface. u

2. In awe-ft detector for a loom having a surface to detected, 'a weighted detector to cooperate with the surface, meansto exert a force on the detector tending to move the sainet'o'ward the surface to be detected, and means to cause an abrupt change in the application of the force to the detector, the

energy stored in the weighteddetector acting to move the same into contact with the change in the application of the force and tending to move the detector to indicating position.

3. In a weft detector for looms having a surface to be detected, a weft detector to cooperate with the surface, a support for the detector, means to cause and arrest relative movement between the support and the surface, and weighted means operatively connected to the detector and acting by reason of the inertia thereof to tend to give the detector an operative movement when the said relative movement of the support is arrested. 1 I

4. In a weft detector for looms having a surface to be detected, a detector to coopcrate with the surface, a support for the detector with respect to which the detector,

is n'1ovable, weighted means operatively connected to the detector and mounted for movement relatively to the support, and means to cause and arrest movement of, the support toward the surface, the inertia of the weighted means exerting a force on the detector tending to give the same an indicating movement when the movement of the support is arrested.

5. In a weft detector for looms having a surface to be detected, adetector to 000p erate with the surface, a movable support for the detector movable to causev relative movement of the detector and surface, means to arrest the movement of the support, and a weighted member effective by the inertia thereof after the movement of the support has ceased to move the detector toward the surface and tending to give the same an indisurface to be detected, a detector to coopcrate with the surface, a weighted member operatively connected to the detector and freely movable, means to move the detector and the weighted member toward the surface, and means to arrest such motion, the detector being acted upon by the weighted member when the motion is arrested to tend to give the detector an indicating movement.

7. In a weft detector for looms having a surface to be detected, a weft detector to cooperate with the surface, a support for the detector, means to cause and arrest relative movement between the support and the surface, weighted means operatively connected to the detector and acting by reason of the inertia thereof to tend to give the detector an operative movement when the said relative movement of the support is arrested,

and resilient means to restore the detector and weighted means to normal position.

8. In a weft detector for looms having a surface to be detected, a detector to cooperate with the surface, a movable support for thedetector movable to cause relative surfaceto be detected, after the abrupt movement-of the detectorand surface, means to arrest the movement of the support, a Weighted member effective by the inertia thereof after the movement of the support has ceased to move the detector toward the surface and tending to give the same an indicating movement, and resilient means to .comethe yielding'means and move the tie tector toward the surface and tendto give the same an indlcating movement:

10. Ina weft detector for looms having a surface to be detected, a weighted detector to cooperate with the surface, a support on which the detector is freely movable, means to move the support toward the surface to be detected, and means to arrest movement of the support toward the surface, the arresting of the movement tending to cause the weighted detector because of the inertia ill) thereof to continue to move toward the surface and to tend to give the detector an indicating movement.

11. In a weft detector for looms having a surface to be detected, a weighted detector to cooperate with the surface, a support on which the detector is freely movable, resilient means interposed between the sup" port and the detector to hold the latter away from the surface,means to move the support and detector toward the surface, and means to arrest such motion, the arresting of the movement of the support toward the surface causing the weighted detector because of the inertia thereof to overcome the resilient means and move toward the surface and tend to have an indicating movement.

'12. In a weft detector for looms having a surface to be detected, a transferrer arm,

means to cause and arrest movement of the transferrer arm toward the surface to be detected, and a weighted detector supported by but freely movable with respect to the transferrer arm and normally held away from the surface, said weighted detector because of the inertia thereof moving toward the surface as the transferrer arm is arrested in its movement toward the surface.

13. In a weft detector for looms having a surface to be detectedfa transferrer arm movable toward and from the surface to be detected, a weighted weft detector freely movable on the transferrer arm toward and from the surface to be detected, and resilient means acting normally to hold the detector llfr away from the surface, the detector because of its inertia tending to continue its motion toward the surface against. the action of the:

resilient means when the transferrer arm' stops moving toward and starts to move from the surface to be detected. 7

lat. In a weft detector for looms having a surface to be detected, a transferrer arm, means to cause and arrest movement of the same toward the surface to be detected, a spring pressed plunger on the arm, a latch normally holding the plunger in inoperative position, a weighted detector supported by and freely movable with respect to the transferrer arm, the detector because of the in ertia thereof being moved toward the surface as the transferrer arm is arrested in its motion, and means actuated by the detector to release the latch and plunger when the detector movestoward asurface having an insufficient supply of weft.

15. I11 a weft detector for looms having a surface to be detected, a transfe'rrer'arm, means to cause and arrest movement of the same toward the surface to be detected, a

springpressed. plunger on the arm, alatch normally holding the plunger in inoperative position,- a weighted detector supported by and freely movable with respect to the trans said meanswhen the transferrer arm is arrested.

In testimony whereof I have hereunto aflixed my signature.

RIGHARD TURNER. 

